Intercalative redox polymerization and characterization of poly(n-vinyl-2-pyrrolidinone) in the gallery of vermiculite: A novel inorganic–organic hybrid material
20 Jun 2000-Journal of Applied Polymer Science (John Wiley & Sons, Inc.)-Vol. 76, Iss: 12, pp 1825-1830
About: This article is published in Journal of Applied Polymer Science.The article was published on 2000-06-20. It has received 17 citations till now. The article focuses on the topics: Hybrid material & Polymerization.
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TL;DR: A review of the academic and industrial aspects of the preparation, characterization, materials properties, crystallization behavior, melt rheology, and processing of polymer/layered silicate nanocomposites is given in this article.
6,343 citations
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...[119] Nisha A, Rajeswari MK, Dhamodharan R....
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...In addition, selective polymers like PVA [47,109–112], poly(N-vinyl pyrrolidone) [113–117], poly(vinyl pyrrolidinone) [118,119], poly(vinyl pyridine) [120], poly(ethylene glycol) [121], poly(ethylene vinyl alcohol) [122], poly(vinylidene fluoride) [123], poly( p-phenylenevinylene) [124], polybenzoxazole [125], poly(styrene-co-acrylonitrile) [126], ethyl vinyl alcohol copolymer [127], polystyrene–polyisoprene diblock copolymer [128, 129] and others [130] have been used....
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01 Dec 1991
TL;DR: In this article, self-assembly is defined as the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds.
Abstract: Molecular self-assembly is the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds. Molecular self-assembly is ubiquitous in biological systems and underlies the formation of a wide variety of complex biological structures. Understanding self-assembly and the associated noncovalent interactions that connect complementary interacting molecular surfaces in biological aggregates is a central concern in structural biochemistry. Self-assembly is also emerging as a new strategy in chemical synthesis, with the potential of generating nonbiological structures with dimensions of 1 to 10(2) nanometers (with molecular weights of 10(4) to 10(10) daltons). Structures in the upper part of this range of sizes are presently inaccessible through chemical synthesis, and the ability to prepare them would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.
2,591 citations
TL;DR: In this paper, polysulfone/organoclay nanocomposites were prepared via a solution dispersion technique, and were characterized by X-ray diffraction, transmission electron microscopy, stress-strain measurements in elongation, and thermogravimetric analysis.
138 citations
TL;DR: In this article, an extensive review presents recent studies in polymer nanocomposites based on layered silicate and the background, morphology, preparations, and properties of these materials are discussed.
Abstract: The nanocomposites are materials, which involve fillers in the nanometer scale, yielding substantial improvements. Polymer-layered silicate nanocomposites have received much attention during the past decade and have great interest both in the academic field and in industry, since they often give more attractive improvement to material properties than both micro- and macrocomposite materials. This extensive review presents recent studies in polymer nanocomposites based on layered silicate. The background, morphology, preparations, and properties of these materials are discussed. The review covers and discusses various modern methods and equipments in the preparation of nanocomposites, deeply focusing on the morphology of nanocomposites and its effects on the overall properties. © 2013 Wiley Periodicals, Inc. Adv Polym Technol 2013, 32, 21368; View this article online at wileyonlinelibrary.com. DOI 10.1002/adv.21368
114 citations
TL;DR: In this paper, maleated styrene-ethylene butylene-styrene (SEBS-g-MA) elastomer was applied to polypropylene (PP)/vermiculite (VMT) nanocomposites.
Abstract: Impact-modified polypropylene (PP)/vermiculite (VMT) nanocomposites toughened with maleated styrene-ethylene butylene-styrene (SEBS-g-MA) were compounded in a twin-screw extruder and injection-molded. VMT was treated with maleic anhydride, which acted both as a compatibilizer for the polymeric matrices and as a swelling agent for VMT in the nanocomposites. The effects of the impact modifier on the morphology and the impact, static, and dynamic mechanical properties of the PP/VMT nanocomposites were investigated. Transmission electron microscopy revealed that an exfoliated VMT silicate layer structure was formed in ternary (PP-SEBS-g-MA)/VMT nanocomposites. Tensile tests showed that the styrene-ethylene butylene-styrene additions improved the tensile ductility of the (PP-SEBS-g-MA)/VMT ternary nanocomposites at the expense of their tensile stiffness and strength. Moreover, Izod impact measurements indicated that the SEBS-g-MA addition led to a significant improvement in the impact strength of the nanocomposites. The SEBS-g-MA elastomer was found to be very effective at converting brittle PP/VMT organoclay composites into tough nanocomposites.
76 citations
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TL;DR: The ability to prepare structures in the upper part of this range of sizes would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.
Abstract: Molecular self-assembly is the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds. Molecular self-assembly is ubiquitous in biological systems and underlies the formation of a wide variety of complex biological structures. Understanding self-assembly and the associated noncovalent interactions that connect complementary interacting molecular surfaces in biological aggregates is a central concern in structural biochemistry. Self-assembly is also emerging as a new strategy in chemical synthesis, with the potential of generating nonbiological structures with dimensions of 1 to 10(2) nanometers (with molecular weights of 10(4) to 10(10) daltons). Structures in the upper part of this range of sizes are presently inaccessible through chemical synthesis, and the ability to prepare them would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.
3,119 citations
01 Dec 1991
TL;DR: In this article, self-assembly is defined as the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds.
Abstract: Molecular self-assembly is the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds. Molecular self-assembly is ubiquitous in biological systems and underlies the formation of a wide variety of complex biological structures. Understanding self-assembly and the associated noncovalent interactions that connect complementary interacting molecular surfaces in biological aggregates is a central concern in structural biochemistry. Self-assembly is also emerging as a new strategy in chemical synthesis, with the potential of generating nonbiological structures with dimensions of 1 to 10(2) nanometers (with molecular weights of 10(4) to 10(10) daltons). Structures in the upper part of this range of sizes are presently inaccessible through chemical synthesis, and the ability to prepare them would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.
2,591 citations
TL;DR: The intercalation of polynuclear hydroxy metal cations and metal cluster cations in smectites affords new pillared clay catalysts with pore sizes that can be made larger than those of conventional zeolite catalysts.
Abstract: Recent advances in the intercalation of metal complex cations in smectite clay minerals are leading to the development of new classes of selective heterogeneous catalysts. The selectivity of both metal-catalyzed and proton-catalyzed chemical conversions in clay intercalates can often be regulated by controlling surface chemical equilibria, interlamellar swelling, or reactant pair proximity in the interlayer regions. Also, the intercalation of polynuclear hydroxy metal cations and metal cluster cations in smectites affords new pillared clay catalysts with pore sizes that can be made larger than those of conventional zeolite catalysts.
1,456 citations
TL;DR: A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmoroniite intercalated with an ammonium salt of dodecylamine as mentioned in this paper.
Abstract: A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmorillonite intercalated with an ammonium salt of dodecylamine. Montmorillonite consists of stacked silicate sheets about 2000 A in length, 10 A in thickness. In this hybrid, montmorillonite is dispersed homogeneously into the polyimide matrix and oriented parallel to the film surface. Thanks to this special structure, this hybrid showed excellent gas barrier properties. Only 2 wt % addition of montmorillonite brought permeability coefficients of various gases to values less than half of those of ordinary polyimide. Furthermore, this hybrid had low thermal expansion coefficient. © 1993 John Wiley & Sons, Inc.
1,387 citations
1,102 citations